Resetting The Transmitter With The User-Coded Reset Controller During Device Operation - Altera Cyclone V Device Handbook

3-8

Resetting the Transmitter with the User-Coded Reset Controller during Device Operation

Figure 3-5: Reset Sequence Timing Diagram for Transmitter using the User-Coded Reset Controller
during Device Power-Up
Table 3-3: Guidelines for Resetting the PLL, TX PMA, and TX PCS
To Reset
PLL
TX PMA
TX PCS
Resetting the Transmitter with the User-Coded Reset Controller during Device Operation
Follow this reset sequence if you want to reset the PLL, or analog or digital blocks of the transmitter at any
point during device operation. This might be necessary for re-establishing a link or after certain dynamic
reconfigurations.
The numbers in the following figure correspond to the following numbered list, which guides you through
the transmitter reset sequence during device operation.
1. To reset the transmitter:
• Assert pll_powerdown, tx_analogreset and tx_digitalreset. tx_digitalreset
must be asserted every time pll_powerdown and tx_analogreset are asserted to reset the
PCS blocks.
• Hold pll_powerdown asserted for a minimum duration of t
• Deassert tx_analogreset at the same time or after pll_powerdown is deasserted.
2. After the transmitter PLL locks, the pll_locked status is asserted after t
locks, the pll_locked status signal may toggle. It is asserted after t
Altera Corporation
mgmt_rst_reset 1
1
pll_powerdown
tx_analogreset 1
tx_digitalreset 1
pll_locked
tx_cal_busy
4
t
tx_digitalreset
t max 10 μs
2
pll_lock
3
You Must Reset
pll_powerdown
tx_analogreset
tx_digitalreset
tx_analogreset
tx_digitalreset
tx_digitalreset
Transceiver Reset Control in Cyclone V Devices
min 20 ns
.
pll_powerdown
. While the TX PLL
pll_lock
.
pll_lock
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CV-53003
2013.05.06